1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "SkPMFloat.h"
9 #include "Test.h"
10
DEF_TEST(SkPMFloat,r)11 DEF_TEST(SkPMFloat, r) {
12 // Test SkPMColor <-> SkPMFloat
13 SkPMColor c = SkPreMultiplyColor(0xFFCC9933);
14 SkPMFloat pmf(c);
15 REPORTER_ASSERT(r, SkScalarNearlyEqual(255.0f, pmf.a()));
16 REPORTER_ASSERT(r, SkScalarNearlyEqual(204.0f, pmf.r()));
17 REPORTER_ASSERT(r, SkScalarNearlyEqual(153.0f, pmf.g()));
18 REPORTER_ASSERT(r, SkScalarNearlyEqual( 51.0f, pmf.b()));
19 REPORTER_ASSERT(r, c == pmf.round());
20
21 // Test rounding.
22 pmf = SkPMFloat(254.5f, 203.5f, 153.1f, 50.8f);
23 REPORTER_ASSERT(r, c == pmf.round());
24
25 pmf = SkPMFloat(255.9f, 204.01f, 153.0f, -0.9f);
26 REPORTER_ASSERT(r, SkPreMultiplyColor(0xFFCC9900) == pmf.trunc());
27
28 // Test clamping.
29 SkPMFloat clamped(SkPMFloat(510.0f, 153.0f, 1.0f, -0.2f).roundClamp());
30 REPORTER_ASSERT(r, SkScalarNearlyEqual(255.0f, clamped.a()));
31 REPORTER_ASSERT(r, SkScalarNearlyEqual(153.0f, clamped.r()));
32 REPORTER_ASSERT(r, SkScalarNearlyEqual( 1.0f, clamped.g()));
33 REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.0f, clamped.b()));
34
35 // Test SkPMFloat <-> Sk4f conversion.
36 Sk4f fs = clamped;
37 SkPMFloat scaled = fs * Sk4f(0.25f);
38 REPORTER_ASSERT(r, SkScalarNearlyEqual(63.75f, scaled.a()));
39 REPORTER_ASSERT(r, SkScalarNearlyEqual(38.25f, scaled.r()));
40 REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.25f, scaled.g()));
41 REPORTER_ASSERT(r, SkScalarNearlyEqual( 0.00f, scaled.b()));
42
43 // Test 4-at-a-time conversions.
44 SkPMColor colors[4] = { 0xFF000000, 0xFFFF0000, 0xFF00FF00, 0xFF0000FF };
45 SkPMFloat floats[4];
46 SkPMFloat::From4PMColors(colors, floats+0, floats+1, floats+2, floats+3);
47
48 SkPMColor back[4];
49 SkPMFloat::RoundTo4PMColors(floats[0], floats[1], floats[2], floats[3], back);
50 for (int i = 0; i < 4; i++) {
51 REPORTER_ASSERT(r, back[i] == colors[i]);
52 }
53
54 SkPMFloat::RoundClampTo4PMColors(floats[0], floats[1], floats[2], floats[3], back);
55 for (int i = 0; i < 4; i++) {
56 REPORTER_ASSERT(r, back[i] == colors[i]);
57 }
58 }
59